Comparison
Overview
Company snapshot and where each provider is based.
| Field | GMS | seven.io |
|---|---|---|
| What it is | Enterprise CPaaS and A2P messaging provider offering SMS, WhatsApp, Viber, RCS and email through a single API, plus messaging-hub and SMS-firewall services for mobile network operators. | German CPaaS platform (formerly sms77) providing SMS, RCS, WhatsApp and voice APIs with data processed on German-hosted infrastructure. |
| Founded | 2006 | 2003 |
| Ownership | private | private |
| Employees | 500-1,000 | 2-10 |
| HQ city | Baar | Kiel |
| HQ country | Switzerland | Germany (EU) |
What's the differenceseven.io edges ahead on the overall messaging.dev Score (42 vs 36). GMS is private and headquartered in Baar, Switzerland; seven.io is private and based in Kiel, Germany (EU).
Channels
Which messaging channels each provider can send and receive on.
| Field | GMS | seven.io |
|---|---|---|
| SMS | Yes | Yes |
| MMS | No | No |
| RCS | Yes | Yes |
| Yes | Yes | |
| Viber | Yes | No |
| Facebook Messenger | No | No |
| Telegram | No | No |
| Apple Messages for Business | No | No |
| Voice | No | Yes |
| Yes | No |
What's the differenceThey share 3 channels. GMS additionally offers Viber, Email, while seven.io additionally offers Voice.
Developer Experience
How quickly a developer can sign up and send a first message.
| Field | GMS | seven.io |
|---|---|---|
| Self-service onboarding | No | Yes |
| Free developer credit | No | €0.50 free test credit |
| Docs quality | med | high |
| Documentation | Open ↗ | Open ↗ |
| SDKs | iOS (Swift), Android (Kotlin) | PHP, JavaScript, Python, Go, Ruby, .NET, Rust, Kotlin, Elixir, Swift |
| Sandbox / test env | No | Yes |
| API types | REST | REST, SMPP, SMTP |
What's the differenceSeven.io offers Self-service onboarding, while GMS does not; on SDKs, GMS adds iOS (Swift), Android (Kotlin); seven.io adds PHP, JavaScript, Python, Go, Ruby, .NET, Rust, Kotlin, Elixir, Swift; seven.io offers Sandbox / test env, while GMS does not; on API types, seven.io adds SMPP, SMTP.
Data & Compliance
Data residency options and enterprise compliance certifications.
| Field | GMS | seven.io |
|---|---|---|
| EU data residency | Yes | Yes |
| US data residency | No | No |
| Choose region | No | No |
| GDPR | Yes | Yes |
| ISO 27001 | Yes | Yes |
| SOC 2 | No | No |
| HIPAA | No | No |
What's the differenceGMS and seven.io are closely matched on data & compliance — no material differences in the tracked fields.
Data Retention
How long message content and metadata are stored, and whether that is configurable.
| Field | GMS | seven.io |
|---|---|---|
| Retention policy | Not publicly documented in detail. GMS's privacy notice states personal data is processed under EU GDPR (Regulation (EU) 2016/679) and held at its Switzerland headquarters (recognized by the European Commission as providing an adequate level of data protection); no specific retention periods for message content or metadata are published. GMS also holds ISO/IEC 27701 (privacy information management) certification. | Log files are stored only for the legally required period and subsequently anonymized, following a stated data-minimization principle; exact message-content retention periods are not publicly documented in detail. Processing runs on German/EU infrastructure ("Pure EU Routing") in ISO 27001-certified data centers, with an online-signable DPA available. |
What's the differenceGMS: Not publicly documented in detail. GMS's privacy notice states personal data is processed under EU GDPR (Regulation (EU) 2016/679) and held at its Switzerland headquarters (recognized by the European Commission as providing an adequate level of data protection); no specific retention periods for message content or metadata are published. GMS also holds ISO/IEC 27701 (privacy information management) certification. seven.io: Log files are stored only for the legally required period and subsequently anonymized, following a stated data-minimization principle; exact message-content retention periods are not publicly documented in detail. Processing runs on German/EU infrastructure ("Pure EU Routing") in ISO 27001-certified data centers, with an online-signable DPA available.
Pricing & Credits
Pricing model and the cost of a first message.
| Field | GMS | seven.io |
|---|---|---|
| Pricing model | Custom enterprise pricing negotiated with sales; no public self-service or per-message price list. | Prepaid pay-as-you-go: top up account balance and pay per message sent, with no monthly fee or subscription required for API access. |
| SMS starting price | Not published | €0.075 per SMS (base rate incl. Germany and most EU countries); non-EU rates vary by country |
| Free developer credit | No | €0.50 free test credit |
What's the differenceGMS and seven.io are closely matched on pricing & credits — no material differences in the tracked fields.
Reach & Reliability
Global coverage and delivery dependability.
| Field | GMS | seven.io |
|---|---|---|
| Countries covered | 0 | 0 |
| Direct operator connections | Yes | No |
| Published uptime SLA | 99.99% network availability (claimed; no formal SLA published) | No published SLA |
What's the differenceGMS offers Direct operator connections, while seven.io does not.
Company & Trust
Independent reviews and company profile.
| Field | GMS | seven.io |
|---|---|---|
| G2 rating | 0.0 | 0.0 |
| G2 reviews | 0 | 0 |
| Ownership | private | private |
| Employees | 500-1,000 | 2-10 |
What's the differenceGMS and seven.io are closely matched on company & trust — no material differences in the tracked fields.
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